Each multiple choice question consisting of 4 choices has just one correct answer. If a student makes random guesses, the probability of getting the correct answer is 0.25. An exam consists of 12 sequentially appearing MCQs. A student coming unprepared to the exam intends to make random choices. a. What is the probability that she gets at least 10 of them correct. b. What is the probability that she needs to attempt 8 question to get the first correct guess c. What is the probability that she has to attempt 10 to get 4 correct answers?

Q: The doubling time of a bank account balance is 8 years. By what factor does it grow in 16 years? In ...

A: Given, Doubling time = 8 years  

Q: 1. Below is a sample of 20 house prices (in thousands of pounds) from an estate agent in a small Eng...

A: As per Bartleby guideline for more than three question asked only first three is to be answered plea...

Q: 1.) The Pool Hall rents tables by the hour and also rents McDermotte pool cues for purists that can'...

A: The service time is 75 minutes so the service rate is μ=6075=0.8 customer per hour. The arrival time...

Q: Here are the meanings of some of the symbols that appear in the statements below. • C means "is a su...

A: { 11,12,14} is proper subset of { 11,12,13,14,15} is true 2• {1,2,3,4} is not proper subset of empty...

Q: Twenty-four per 1000 eggs of an insect do not hatch under low humidity conditions, as shown in an ex...

A: Given information: Twenty- four per 1000 eggs of an insect do not hatch under low humidity condition...

Q: In statistics, the range is computed as the difference between the minimum and maximum values Range(...

A: Range(x) = Max(x) - Min(x) First we need to find the PDFs of max(X) and min(X).

Q: Suppose that the joint denstiy function of X and Y random variables is as show below

A:

Q: Algorithm and probability

A: Note: Since algorithm is computer subject, only Probability question is to be solved. Kindly re uplo...

Q: . Create a table showing the value of the quantity Q for the first 10 years of growt Year =t Populat...

A:

Q: The average number of relief goods your household receives during a pandemic is 3 per month. What is...

A: Given: λ=3  Type of probability distribution: The type of probability distribution shown in this p...

Q: I need help solving this problem. Thank you! I am unsure of the formula and steps to solve it.

A: We have to fill given blanks.

Q: Rework problem 1 in section 4.2 of your text, involving the flipping of a loaded coin, but assume th...

A: Given the probability of head is; P(H)=0.7 Now the possible outcomes when a coin is tossed four time...

Q: For each pair of statements, choose the one that is true. Og c {q, r} (a) o {a) c {q, r} o {g) g {e....

A: A:{q} is subset of {q,r} Option b is true B:. {g} does not contained in {e,f,h} Option a is true C:....

Q: Complete the following truth table. Use T for true and F for false. You'may add more columns, but th...

A: Conditional statement q→p  is false only when  q is true and p is false, otherwise it is always true...

Q: Two 9 years old boys are watching a television replay of a boxing match between Muhammad Ali and joe...

A: In this situation, the risk involved is known as speculative risk. In a speculative risk, there is u...

Q: A pendulum bob swings through an arc 80 inches long on its first swing. Each swing thereafter, it sw...

A: First swing : 80 inches  it swings only 60% as far as on the previous swing.

Q: You pay 10 dollars to pick two numbers, with replacement, between 1 and 1000 at random. If the numbe...

A: Given that with replacement pick two number between 1 and 1000

Q: The doubling time of a population of flies is 5 hours. By what factor does the population increase i...

A: Factor = 2t/Td where, t is required time Td = doubling time = 5 hrs

Q: At QT Sugar factory the amounts which go into bag of sugar are supposed to be normally distributed w...

A: The mean of the distribution is 36 kg. The standard deviation of the distribution is 0.1 kg. The amo...

Q: o https://www-awu.aleks.com/alekscgi/x/Isl.exe/1o_u-IgNslkr7j8P3jH-IBi67Jxkop4GtU74E36QsaO3t0VD_LL5v...

A: We have to find subset

Q: Scores on a Literature test have an average of 80 with a standard deviation of 6. What is the Z-scor...

A: Solution: Let X be the score on a Literature test. From given information, X has mean µ=80 and a sta...

Q: Calculate P(eating breakfast | age 14-17 )

A:

Q: Statement True False ØC {q, w, z} {1, 2, 3, 4, 5} C {2, 4, 5} {d, g.j)(c, d. f. g, h, j} {12, 13, 15...

A: We need to state if the given statements are true

Q: The following table represents the joint probability distribution of the number of letters dropped d...

A: The joint probability distribution is,   Y=2 Y=3 Y=4 Y=5 Px(X=x) X=0   0.3 0.03 0.2 0.54 X=1...

Q: The median annual income of subscribers to Shutterbug magazine is $75,000 (Home Theater website, Aug...

A: Solution: Median annual income of subscribers to shutterbug magazine= $75,000 Number of subscribers ...

Q: If you have a bag of 12 marbles half are green and half are red, what is the probobility that if you...

A: Given Data: The total number of marbles is: n=12 The number of marbles is drawn is: d=4 Half marbles...

Q: The Venn diagram shows sets 4, B, C, and the universal set U. Shade (Bn 4)' on the Venn diagram. -U-...

A: BnA

Q: Suppose, the walking speed of an elderly is no more than 6 km per hour. The walking speed, Y, in km ...

A: The probability density function is fY=y=118,                     0≤y≤419y-16,                  4≤y≤...

Q: If you know that 30 percent of all high school graduates go to college. From 20 graduates selected a...

A: We have to find given probability.

Q: Quen: In a pharmaceutical study, two drugs (A and B) and a placebo are to be compared for effects. F...

A: There are three drugs. Out of 50 people, 20 are given drug A 20 are given drug B 10 people are given...

Q: s1) a)X ∼ exp (λ). Under the condition {X> 3} fX | {X> 3} (x | X> 3) =? and E [X | X> 3]...

A: X ∼ exp (λ) PX>xX>3=PX>xX>3   ; X>30                         ; otherwise  

Q: s known that o = 2.15 pounds. %3D sample should be taken to be 93% confident that the sample mean is...

A: The sample size can be calculated as: n=z×σE2 Here, z = desired confidence level E = The allowable ...

Q: a. What is the probability that it would take more than 4 minutes to reach the accident? b. What is ...

A: Given: The function of reach of fire service response team is, fY=y=115y+1          0≤y≤319y-3     ...

Q: A lock consists of 3 dials, where each dial has 4 letters. What is the probability of guessing the r...

A:

Q: In any given year, a factory has a 20% probability of having an accident. About every how many years...

A: Given, probability of having an accident p = 0.20  

Q: Use technology or Z distribution table to find the indicated area the weight of grapefruits in a bin...

A: From the given information, the weight of grapefruits in a bin are normally distributed with a mean ...

Q: According to Entrepreneur Magazine, Vol. 23, No. 10, the start-up cost for a new candy store (in tho...

A: From the given information, let X be the start-up cost for a new candy store in thousands of dollars...

Q: What is degree of freedom

A:

Q: Problem 1 Please answer the below questions based on this data: 44, 20, 85, 68, 64, 83, 56, 70, 55, ...

A: Hi! Thank you for the question As per the honour code, We’ll answer the first question since the exa...

Q: When the probability that we're incorrect is 20%, our level of confidence is: 95% a. b. 99% 90% C. C...

A: When the probability that an assumption is correct is p% then the confidence is calculated by the fo...

Q: How many different committees can be formed from 7 women and 8 men if the committee consists of 5 wo...

A: We can select 5 women from 7 women in 7C5=21 ways We can select 4 men from 8 men in 8C4=70 ways    

Q: The table lists the eight human blood types. It also shows how blood types determine who a person ca...

A: Given that X'= the set of blood types that that type B- cannot donate blood to.  This means X= the s...

Q: If you know that the probability Ali scores a goal is 0.78, then the probability that his fifth goal...

A: Probability ( 5th goal on his 8th shot is)=.00307

Q: In an experiment to examine the relationship between heart disease and the place of life,the followi...

A:

Q: Using an example that you will give, create a probability mass and cumulative variable. you should c...

A: As per given by the question, create a probability mass and cumulative variable and from probability...

Q: 12. Glven that a randomly chosen card from a standard deck of 52 cards is less than 7, what is the p...

A: In a standard deck of playing cards there are total 52 cards and 4 suits, such as hearts, diamonds, ...

Q: Estimate the average by first rounding to the nearest 1,000: 1,000 2,300 2,600

A: We have given data,  1000,  2300,  2600 Then,  We will find the average by first rounding to the nea...

Q: Decision the probability that Yankees will win the game is 0.56 and the probability that Yankees wil...

A: Suppose X and Y are two events, with respective probabilities P (X) and P (Y). Denote (X ∩ Y) as the...

Q: Question 18 If the degree of the vertex is = 1 then the node called O Isolated O Pendant O Cycle Nod...

A: We have to find correct option.

Q: One hundred eighty-five people each purchased one raffle ticket. Three winning tickets are randomly ...

A: Total number of tickets sold= 185 Given that the first price is $500, the second prize is $300, and ...

Contingency Table

A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.

Binomial Distribution

Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.